Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5791968 | Grinding method and grinding system for steels | Hiroyuki Matsumura, Keiji Tsujita, Hidetaka Tanaka, Kazumi Daitoku, Tomoharu Shimokasa +2 more | 1998-08-11 |
| 5434112 | High pressure injection nozzle | Shigetomo Matsui, Hiroyuki Matsumura, Yasuhiro Kumon, Shigeru Nakayama, Keiji Tsujita +3 more | 1995-07-18 |
| 5407503 | Process for producing silicon carbide nozzle | Shigetomo Matsui, Hiroyuki Matsumura, Hideki Shimizu, Tatsuo Obata, Masashi Shigeto | 1995-04-18 |
| 5334561 | High pressure injection nozzle | Shigetomo Matsui, Hiroyuki Matsumura, Yasuhiro Kumon, Shigeru Nakayama, Keiji Tsujita +3 more | 1994-08-02 |